PROCESS FOR THE PREPARATION OF AROMATIC POLYISOCYANATE COMPOUNDS IN THE GAS PHASE.

摘要

The invention relates to a process for the preparation of aromatic compounds substituted by at least two isocyanate groups. The process according to the invention consists in bringing into contact at least one compound (A) comprising at least two primary amine functional groups and at least one minus one aromatic unit, with phosgene, the two reactants being introduced in the gas phase, in the presence of an excess of phosgene, relative to the number of moles of amine functions of the compound (A), between 0 and 100%.